They have synopses and linked/related articles ("Relaterade Nyheter")[0] from different news sources and their archive goes back a year[1].

Given this, I'd be inclined to believe that it's curated. However, I haven't studied it enough to verify if news links > x months are added as "related news" to current news articles.

[0] - https://nyhetsnotiser.se/ekonomi/merkels-eftertradare_-ecb-s...

[1] - https://nyhetsnotiser.se/arkiv/